package com.gocoolmall.seckill.scheduled;

import com.gocoolmall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;


/**
 * 秒杀商品的定时上架
 *  每天晚上3点上架；上架最近三天需要秒杀的商品
 *  当天00：00：00
 *  明天：
 *  后天：
 */
@Slf4j
@Service
public class SeckillSkuScheduled {
    private final String uplocal_lock ="sekill:upload:lock";

    @Autowired
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    //TODO 幂等性问题
    @Scheduled(cron = "0/3 * * * * ?")
    public void uploadSeckillSkuLatest3Day(){
        //1、重复上架无需处理
        log.info("上架秒杀的商品信息....");
        //分布式锁.锁的业务执行完成，状态已经更新完成。释放锁以后。其他人获取到就会拿到最新的执行状态。
        RLock lock = redissonClient.getLock(uplocal_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLatest3Day();
        } finally {
            lock.unlock();
        }
        log.info("上架秒杀的商品成功....");
    }

}
